Hot-air furnace



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No. 410,261. v 1 Pate'nted Spt'. 3, 1889 WITNESSES m "mwvrofi UN TED STATES PATENT OFFICE.

JAMES BAKER, OF ST. LOUIS, MISSOURI.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 410,261, dated September 3, 1889. Application filed October 24, 1888. Serial No. 289,037. (No model.)

To all whom, it may concern.-

Be it known that 1, JAMES BAKER, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented new and useful Improvements in Hot-Air Furnaces; and I do hereby declare the following to be a full, clear, and exact description of said invention, reference beinghad to the accompanyingsumed without smoke or soot.

Myinvention consists in the novel construction of fines and pipes through which the heated air from the lamp or burner is caused to pass first in an upward direction and then down through pipes which discharge the air that has become partially cooled into the room at the lower portion of the heating device.

My invention consists, further, in providing a main fine with the inverted cone around which the heated currents pass, said cone be ing designed to prevent the back-pressure of the air-currents on the lamp or burner.

Other novel features will be fully described hereinafter, and pointed out in the claims.

Referring to the drawings, Figure l is a longitudinal sectional view of my device, sh owing the lamp in position. Fig. 2 is a vertical sectional view on the line x w of Fig. 1, looking in the direction of the arrow 1.

A indicates the base of the stove or heater, made of sheet-iron or of other suitable material and of any suitable or desirable shape, said base being perforated with a series of small holes a and provided with a lamp B, or other suitable device for burning oil or gas. In many localities gas is not convenient, and in such cases ordinary coal-oil may be used in any suitable burner; but by preference I use gas, either natural or manufactured, and when gas is used I prefer to use a burner such as is shown, described, and claimed in an application filed by me of even date herewith, Serial No. 289,038. The central upper portion signed to receive the upper portion of the lamp or burner.

I is a hollow cone secured to the upper end of the pipe H in any suitable manner, and is somewhat smaller than the pipe G, so as to leave a space between the cone I and the pipe G for the passage of the heated air-currents. The object of said cone is to provide against back-pressure on the lamp or burner of the heated air, and thus causing at all times an upward travel of said air-current. The ends of the drum 0 communicate with the pipes K near their center, the lower ends of said pipes being arranged to communicate with the interior of the base A, while the upper portions of pipes K are joined to and communicate with the ends of the drum F, as shown in Fig. 1.

L are pipes, the lower ends of which rest upon the upper portion of the base A, while their upper ends communicate with the drum F, the pipes having several small perforations at their lower ends to allow the escape of the hotair currents into the chamber or compartment. I prefer to arrange these pipes two at each side of the drum F; but any de sired number may be used which will produce the best result.

In the central upper portion of the drumF is an opening M, which communicates with the pipe N, said pipe N being closed by the cone-shaped stopper 0, said stopper extending down into the dru IIIF some little distance below its center, and the object of which is to deflect the air-current and throw them oif toward the end of drum F and into pipes K and IJ- A space P is left between the upper end of the pipe H and the opening Eof the drum C, so that any encess of hot air may pass into the drum 0 and from thence to the pipes K.

hot air in the drum to escape into theroom.

o1 compartment. The central aperture of the base A is made somewhat larger than the lamp-chimney, and is provided with a sliding damper S, by which the current of air pass- 7 ing around said chimney may be regulated.

The operation of my device is as follows:

Air is admitted. to the lamp or burner to support combustion in any suitable manner,while the air designed to be heated by the combustion of gas or oil passes into the chamber A through the perforations a, up through the pipe D into the pipe H, where it comes in contact with the hot air produced by the combustion of the oil or gas, and is deflected outward toward the sides of the pipe G by means of the cone 1, and passing into the drum F is defiected toward both ends of said drum by means of the coneshaped stopper 0. These hot currents give oif their heat through the walls of the drum F by radiation, and as the air becomes cooled it descends into the pipes K and L, and the currents passing through pipes K are discharged into the base A, while the currents descending into the pipes L are discharged through the apertures C.

By this construction and arrangement I am enabled to eifect a complete combustion of oil or gas, thus obviating the generation of offensive odors, smoke, or the accumulation of soot. I

It will be noticed that no fine or chimney communicating with the exterior air is used, and that all the heat generated is utilized for heating purposes.

\Vhat I claim is 1. A hot-air furnace having a lamp or burner located in the base, a central flue arranged around the lamp or burner, said flue communicating with the base and with horizontal drums, an inverted cone or deflector 0, located above the central flue, and the pipes K, communicating with the horizontal drums and with the base, substantially as described.

2. A hot-air furnace having a lamp or burner located in the base, a central flue arranged around the lamp or burner receptacle, a central tapering pipe arranged within the fine and provided with anextension parallel with the central flue, an inverted hollow cone secured to and above the central flue, the pipe K, and the horizontal drums, the central flue and pipes communicating with the drums and base, substantially as described.

3. A hot-air furnace having a base in which the lamp or burner is placed, a central flue arranged around the burner, said iiue communicating with the base, horizontal drums with which the flue communicates, pipes oommunicating with the base and with the drums, and pipes communicating with the upper drum and having openings near the base for the discharge of air, substantially as set forth.

In testimony whereof I aflix my signature in the presence of two subscribing witnesses.

JAMES BAKER.

Witnesses:

L. W. SINSABAUGH, H. M. STERLING. 

